/**
 * Copyright (C) 2009, 2010 SC 4ViewSoft SRL
 *  
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *  
 *      http://www.apache.org/licenses/LICENSE-2.0
 *  
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package es.mgil.signalStrength;

import java.io.File;
import java.io.FileOutputStream;

import org.achartengine.ChartFactory;
import org.achartengine.GraphicalView;
import org.achartengine.chart.PointStyle;
import org.achartengine.model.SeriesSelection;
import org.achartengine.model.XYMultipleSeriesDataset;
import org.achartengine.model.XYSeries;
import org.achartengine.renderer.XYMultipleSeriesRenderer;
import org.achartengine.renderer.XYSeriesRenderer;
import org.achartengine.tools.PanListener;
import org.achartengine.tools.ZoomEvent;
import org.achartengine.tools.ZoomListener;

import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.Bitmap.CompressFormat;
import android.graphics.Color;
import android.os.Bundle;
import android.os.Environment;
import android.view.View;
import android.view.ViewGroup.LayoutParams;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.Toast;

public class XYChartBuilder extends Activity {
	public static final String TYPE = "type";

	private XYMultipleSeriesDataset mDataset = new XYMultipleSeriesDataset();

	private XYMultipleSeriesRenderer mRenderer = new XYMultipleSeriesRenderer();

	private XYSeries mCurrentSeries;

	private XYSeriesRenderer mCurrentRenderer;

	private String mDateFormat;

	private Button mNewSeries;

	private Button mAdd;

	private EditText mX;

	private EditText mY;

	private GraphicalView mChartView;

	private int index = 0;

	@Override
	protected void onRestoreInstanceState(Bundle savedState) {
		super.onRestoreInstanceState(savedState);
		mDataset = (XYMultipleSeriesDataset) savedState
				.getSerializable("dataset");
		mRenderer = (XYMultipleSeriesRenderer) savedState
				.getSerializable("renderer");
		mCurrentSeries = (XYSeries) savedState
				.getSerializable("current_series");
		mCurrentRenderer = (XYSeriesRenderer) savedState
				.getSerializable("current_renderer");
		mDateFormat = savedState.getString("date_format");
	}

	@Override
	protected void onSaveInstanceState(Bundle outState) {
		super.onSaveInstanceState(outState);
		outState.putSerializable("dataset", mDataset);
		outState.putSerializable("renderer", mRenderer);
		outState.putSerializable("current_series", mCurrentSeries);
		outState.putSerializable("current_renderer", mCurrentRenderer);
		outState.putString("date_format", mDateFormat);
	}

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.xy_chart);
		mX = (EditText) findViewById(R.id.xValue);
		mY = (EditText) findViewById(R.id.yValue);
		mRenderer.setApplyBackgroundColor(true);
		mRenderer.setBackgroundColor(Color.argb(100, 50, 50, 50));
		mRenderer.setAxisTitleTextSize(16);
		mRenderer.setChartTitleTextSize(20);
		mRenderer.setLabelsTextSize(15);
		mRenderer.setLegendTextSize(15);
		mRenderer.setMargins(new int[] { 20, 30, 15, 0 });
		mRenderer.setZoomButtonsVisible(true);
		mRenderer.setPointSize(10);

		mAdd = (Button) findViewById(R.id.add);
		mNewSeries = (Button) findViewById(R.id.new_series);
		mNewSeries.setOnClickListener(new View.OnClickListener() {
			public void onClick(View v) {
				String seriesTitle = "Series "
						+ (mDataset.getSeriesCount() + 1);
				XYSeries series = new XYSeries(seriesTitle);
				mDataset.addSeries(series);
				mCurrentSeries = series;
				XYSeriesRenderer renderer = new XYSeriesRenderer();
				mRenderer.addSeriesRenderer(renderer);
				renderer.setPointStyle(PointStyle.CIRCLE);
				renderer.setFillPoints(true);
				mCurrentRenderer = renderer;
				setSeriesEnabled(true);
			}
		});

		mAdd.setOnClickListener(new View.OnClickListener() {
			public void onClick(View v) {
				double x = 0;
				double y = 0;
				try {
					x = Double.parseDouble(mX.getText().toString());
				} catch (NumberFormatException e) {
					// TODO
					mX.requestFocus();
					return;
				}
				try {
					y = Double.parseDouble(mY.getText().toString());
				} catch (NumberFormatException e) {
					// TODO
					mY.requestFocus();
					return;
				}
				mCurrentSeries.add(x, y);
				mX.setText("");
				mY.setText("");
				mX.requestFocus();
				if (mChartView != null) {
					mChartView.repaint();
				}
				Bitmap bitmap = mChartView.toBitmap();
				try {
					File file = new File(Environment
							.getExternalStorageDirectory(), "test" + index++
							+ ".png");
					FileOutputStream output = new FileOutputStream(file);
					bitmap.compress(CompressFormat.PNG, 100, output);
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
		});
	}

	@Override
	protected void onResume() {
		super.onResume();
		if (mChartView == null) {
			LinearLayout layout = (LinearLayout) findViewById(R.id.chart);
			mChartView = ChartFactory.getLineChartView(this, mDataset,
					mRenderer);
			mRenderer.setClickEnabled(true);
			mRenderer.setSelectableBuffer(100);
			mChartView.setOnClickListener(new View.OnClickListener() {
				@Override
				public void onClick(View v) {
					SeriesSelection seriesSelection = mChartView
							.getCurrentSeriesAndPoint();
					double[] xy = mChartView.toRealPoint(0);
					if (seriesSelection == null) {
						Toast.makeText(XYChartBuilder.this,
								"No chart element was clicked",
								Toast.LENGTH_SHORT).show();
					} else {
						Toast.makeText(
								XYChartBuilder.this,
								"Chart element in series index "
										+ seriesSelection.getSeriesIndex()
										+ " data point index "
										+ seriesSelection.getPointIndex()
										+ " was clicked"
										+ " closest point value X="
										+ seriesSelection.getXValue() + ", Y="
										+ seriesSelection.getValue()
										+ " clicked point value X="
										+ (float) xy[0] + ", Y="
										+ (float) xy[1], Toast.LENGTH_SHORT)
								.show();
					}
				}
			});
			mChartView.setOnLongClickListener(new View.OnLongClickListener() {
				@Override
				public boolean onLongClick(View v) {
					SeriesSelection seriesSelection = mChartView
							.getCurrentSeriesAndPoint();
					if (seriesSelection == null) {
						Toast.makeText(XYChartBuilder.this,
								"No chart element was long pressed",
								Toast.LENGTH_SHORT);
						return false; // no chart element was long pressed, so
										// let something
						// else handle the event
					} else {
						Toast.makeText(XYChartBuilder.this,
								"Chart element in series index "
										+ seriesSelection.getSeriesIndex()
										+ " data point index "
										+ seriesSelection.getPointIndex()
										+ " was long pressed",
								Toast.LENGTH_SHORT);
						return true; // the element was long pressed - the event
										// has been
						// handled
					}
				}
			});
			mChartView.addZoomListener(new ZoomListener() {
				public void zoomApplied(ZoomEvent e) {
					String type = "out";
					if (e.isZoomIn()) {
						type = "in";
					}
					System.out.println("Zoom " + type + " rate "
							+ e.getZoomRate());
				}

				public void zoomReset() {
					System.out.println("Reset");
				}
			}, true, true);
			mChartView.addPanListener(new PanListener() {
				public void panApplied() {
					System.out.println("New X range=["
							+ mRenderer.getXAxisMin() + ", "
							+ mRenderer.getXAxisMax() + "], Y range=["
							+ mRenderer.getYAxisMax() + ", "
							+ mRenderer.getYAxisMax() + "]");
				}
			});
			layout.addView(mChartView, new LayoutParams(
					LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
			boolean enabled = mDataset.getSeriesCount() > 0;
			setSeriesEnabled(enabled);
		} else {
			mChartView.repaint();
		}
	}

	private void setSeriesEnabled(boolean enabled) {
		mX.setEnabled(enabled);
		mY.setEnabled(enabled);
		mAdd.setEnabled(enabled);
	}
}
